Windows 11 25H2 Media Player returns "We couldn't open *file name*. Wait a bit, then try again" error code 0x800701B1

Question

Hi, I'm running Windows 11 25H2 on a Lenovo ThinkPad with NVIDIA Quadro T1000, i7-10850H, with 32GB RAM. I purchased the laptop already with the OS pre-installed, and just discovered that the built in Media Player from Windows is unable to play videos or even music and returns that error code 0x800701B1.

I have all the encoder extensions download from the MS Store and the strangest thing is that videos and music play just fine on third-party apps such as VLC or PotPlayer. They play the files without any issue. The problem is that I have a gallery app called Pictureflect that uses Windows system to integrate the video player and when it tries to read the video it gives that same exact error code.

Things I've tried with no success:

1. Adjust permissions for the entire folder. Since they are accessible by third-party players, I don't think this is the issue.
2. Creating a new local user and playing the video on that new account. Nothing changed, the Media Player returned the same error.

Things I plan to try when I have time off (as I use this laptop for work):

1. In-place repair

Would appreciate any help or guidance to anyone who knows how to fix this issue.

Answer 1

Hi Zachary,

Welcome to Microsoft Q&A!

I appreciate the very clear description of what you’re seeing and have tried. It must feel frustrating when third‑party players work perfectly but the built‑in Media Player fails with error 0x800701B1. Besides what the Q&A Assist has suggested, you can:

1 - Repair/Reset the new Media Player app

• Open Settings > Apps > Installed apps > Media Player
• Click the three-dot > choose Advanced options
• Scroll down and click Terminate > Repair
• If that doesn’t work > click Reset
• Restart Windows and test.

2 - Reinstall Media Player

• Go back to page above > click Uninstall (bottom)
• Restart Windows > open Microsoft Store
• Find and reinstall Media Player.

3 - Reinstall Media Features

• Open Control Panel > Programs > Turn Windows features on or off
• Expand Media Features and UNCHECK everything under > OK
• Restart the PC > go back to the menu > re‑enable all.
• Restart PC again to force Windows to re-register.

You’re right that an in‑place repair upgrade can be the next supported step. But you can also try the built-in reinstallation if possible (Open Settings > System > Recovery > Fix problems using Windows Update > Click Reinstall now). Like in-place repair, both options only refresh your data without erasing anything. But to be careful, remember to back up your important files.

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Answer 2

Error 0x800701B1 with Media Player on Windows 11 25H2 is consistent with general playback failures in the built‑in player while third‑party players still work. The supported troubleshooting for Windows Media Player/Media Player issues on Windows 11 focuses on codecs, database/cache corruption, drivers, and repairing/reinstalling the player.

Follow these steps in order (some may require a restart):

1. Verify file compatibility and codecs

• Ensure the files are in formats supported by the Windows player (for example: MP3, WAV, WMA, AVI, WMV).
• If the error appears only for certain formats, check codec details:
  • Right‑click the media file > Properties > Details tab and review the format/codec.
  • If a specific codec is required, install or update a codec pack that includes it (for example, K‑Lite Codec Pack or CCCP) as described in the codec troubleshooting section.

2. Update Windows and Media Player

• Make sure Windows 11 25H2 is fully updated:
  • Select Start > Settings > Windows Update > Check for updates.
• Media Player updates are delivered via Windows Update and Microsoft Store, so installing all available updates ensures the latest player components.

3. Clear and rebuild the Windows Media Player/Media Player database and cache Corrupted database or cache can cause playback errors even when files are valid.

A. Clear the database

1. Close Windows Media Player/Media Player.
2. Press Windows + R, type: %LOCALAPPDATA%\Microsoft\Media Player\ and press Enter.
3. Delete all files in this folder (do not delete the folder itself).
4. Start the player again so it can rebuild its database.

B. Reset the Media Player library and cache from within the player (if using legacy Windows Media Player interface)

1. Open Windows Media Player and press Ctrl + M to show the menu bar.
2. Select Tools > Advanced > Restore Media Library.
3. Again press Ctrl + M, then Tools > Options > Privacy.
4. Under History, select Clear History and then OK.
5. Update audio and graphics drivers Playback issues can be caused by driver problems, especially after a feature update like 25H2.

• Update audio drivers:
  • Use Device Manager or the Lenovo support site to install the latest audio driver for the ThinkPad model.
• Update graphics drivers:
  • Install the latest NVIDIA Quadro T1000 driver from NVIDIA or Lenovo.

5. Check for system file corruption

• Open Command Prompt as administrator.
• Run: sfc /scannow
• Wait for the scan to complete and follow any on‑screen guidance. If corruption is repaired, test Media Player again.

6. Run the Windows Media Player troubleshooter

• Go to Settings > System > Troubleshoot > Other troubleshooters.
• Run the Windows Media Player troubleshooter. It will attempt to automatically detect and fix common playback issues.

7. Repair or reset Media Player If the issue persists, repair or reset the app:
8. Select Start > Settings > Apps > Installed apps.
9. Locate Windows Media Player (or Media Player).
10. Select the three dots > Advanced options.
11. First choose Repair and test playback.
12. If still failing, choose Reset. Note: this removes custom settings and preferences but not media files or library content.
13. Reinstall Windows Media Player components If repair/reset does not help, reinstall the Media Features:
14. Select Start > Control Panel > Programs.
15. Select Turn Windows features on or off.
16. Uncheck Media Features and click OK.
17. Restart the PC.
18. Return to the same dialog, re‑check Media Features, click OK.
19. Restart again and test Media Player.

If, after completing these steps, Media Player still returns 0x800701B1 while VLC/PotPlayer continue to work, proceed with the in‑place repair upgrade of Windows 11 as planned, since that is the supported next step when system components are damaged beyond what SFC, repair/reset, and feature reinstallation can fix.

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References:

• Troubleshoot Windows Media Player Errors